Ashton Kutcher’s current relationship with old pal Diddy is — how do we say it? — uncomfortable. But the That ‘70s Show star should have known to walk away a long time ago. After all, Diddy warned him things could go sideways.

That threat goes back to the days of Punk’d, the MTV prank show Kutcher hosted from 2003 to 2007. The show was originally going to pull jokes on Everyday Joes, until an early prank involving a fake corpse (always hilarious!) resulted in a $10 million lawsuit against Kutcher, MTV and a Vegas hotel. The show was quickly retooled to punk celebrities like Frankie Muniz and Eliza Dushku.

As Kutcher and friends brainstormed new celebs to prank, someone came up with Sean Combs or whatever stage name he was rocking at the time. Lucky for Kutcher, word got to Diddy before any practical jokes were deployed.

On a 2018 episode of The Late Late Show with James Corden,...